Weft-detecting mechanism



E. H.V RYON WEFT DETECTI NG MECHANI SM Filed Feb, 9, 923

Dec 22, 1925.

E. H.- HYON WEFT DETECTING MECHANISM Filed Feb. 9, 1925 2 shemhm Patented Dec. 1925.

assets? UNITED STATES PAT-ai* erica.

-EPPA E. RYON, OF WA'LTHAM, MASSACHUSETTS, ASSIGNOR T0 CBOMPTON s KNOWLES LOOM WORKS,OF WORCESTER, MASSACHUSETTS, A CORPQRTION OF MASSACHU- sn'rrs.

'WEFT-DETECTING MECHANISI.

.' ;'-`.ation led February S, 1923. Seri-.ii No. 618.137.

To all whom z' may concern:

Be it known that I, EPPA H. Ri'oN, a citizen of the United States, residing at W'altham. in the county of Middlesex and State of l\Iassacliusetts,-have invented' a new and useful left-Detecting Mechanism, of which the folloivin f is a specification.

This invention re ates tot' a mechanism for detecting substantial exhaustion of weft on v the weft carrier of the running shuttle of an automatic weft replenishing loom. In looms using very fine yweft or filling, such as f ine cotton or silk looms,A each weft carrier remains in the running shuttle for a relative :l5 ly long period of time and the weft thereonmakes a very great number of contacts with the weft detector. Such repeated contacts frequently result in wear and breakage of the filling by the weft detector and it is the general object of my invention to avoid or largely reduce this wear'and breakage. vWith this general object in view, my invention consists essentially in the provision of a contact member designed to engage the weft on a full weft carrier and to prevent contact of the weft with the weft detector until thel'supply of weft on the weft carrier is depleted to a' predetermined extent and substantial exhaustion 'of weft is approaching. "I

For the attainment of this desired result, I have devised an exceedingly simple construction which involves the addition of few and simple parts to the weft detecting mechanism at present in use. Undernomnal running conditions, a supplementary'eontact member is locked from relative movement in `the detector slide and receives' the -full thrust 'of the weft Lcarrier, said member being pro- 40, vided with a broadl smooth contact surface for such purposes. When the supply of weft is sufficiently reduced, however, the supplementary contact member is withdrawn from operative position and the subsequent exhaustion `ofthe weft is indicated by the usual weft detector as in the previous practice.

My invention further relates to arrange-I ments and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

'A preferred forni of the invent-iron is shown in the drawings in which Fig. vl is a plan View of my improved ,weft I detecting mechanism;

Fig. 2 is a side elevation thereof;

Fig. 3 is a partial sectional plan view taken along the line 3 3 in Fig. 2;

Fig. 4 is a detail sectional elevation, taken along the line 4-4 in Fig. 3, and

.Figs 5, 6 and 7 are sectional plan views with certain parts omitted 4and showing successive positions of the contact members.

`lleferring to the drawings, 1 have shown a weft detecting mechanism which is in general of the type disclosed in my prior Patent No. 1,352,536, issued September 14, 1920, and comprises a detector slide 1() mounted in a frame or casing 11 pivotally connected by abolt 13 to a stand lprojecting from the loom side (not shown); A bracket o r angle 15 on' the upper face of the slide 10 is provided with un opening to receive a rod 16 which supports a compression spring 17. The rod 16 is threaded at one end in the cover 18 ofthe casing 11 and may be adjust ed therein to limit rearward movement of the slide 10 toward the running shuttle and the weft carrier therein. An adjusting screw 19 provides for vertical adjustment of the'detector slide about its ivot 13. A fixed detector 20 is secured to t ie rear portion of the slide l0 in any convenient man ner as by a clamping screw 21. A movable detector 22 is pivoted to the slide 10 by a screugf or stud 23 and is positioned closely adjacent the fixed detector 20. A, rod or linl 24 (Figs. 3 and 5) is pivoted at 25 to a laterally projecting arm 25 of the movable detector 22 and extends forwardly through the slide 10. i

rlhe frpnt e-nd of the liink24 is pivoted at 271to an arm 28 clamped to one end of a. short horizontal shaft 29 rotatably mounted in bearings 30 and 31 projecting forward from the stand 14. A second arm 32 at the'opposite end of the shaft 29 has a slotted connectionto 'a plunger 33 slidable in a' transverse opening in an upward rejection 34 of the stand 14. The ro]ection 34 is provided with. a slot 35 in which a Heating lever 36 is moved verticaly by an actul ating plunger 37. At its opposite irm contact with a end the floating lever 36 1s connected by a pivot 38 lto a link 39 which extends upward to the indicating mechanism of the magazine (no shown).

The parts thus far described are substantially of the usualconstruction as shown in my prior patent above noted and in them-4 se ves form no part of my resent invention.' Reference may be had to t at patent and to U. S. Patent No. 972,772', issued to me October 11, 1910, for a more complete description and for .details of the construction and operation of` the indicatingmechanism.

My present invention relates particularly to the provision of a supplementary contact member 40. which is mounted to slide lorgitudinally adjacent the tixed detector 2U. or this purpose, the member 40 is preferably grooved oneach side, as indicated at 41 in ig. 3, these grooves being ada ted 'to receive a rib or projection 42 ig. 4) on the side of the fixed detector n() and a. simi.

lar rojection 43 on an outer guide plate 44.

T e member 40 is connected by a toggle link 45 to a toggle arm 46 pivoted at 47 to the slide l() and having a laterally projecting arm 48 forming a bell crank or angle lever therewith. A compression spring 50 (Fig. 5) enga es the front side of the arm 48 and norma ly holds the parts yieldingly in the position shown in Figs. 3 and 5.

The toggle' arm 46 has a projectlon 5l adapted to engage the arm 26 of the movable detector 22 and normally prevent swinging movement of the detector away from the fixed 'detector 20. An adjustable rod or stud 52 is fixed to the front binder 53 of the shuttle box or to some other suitable part movable with the lay and under certain conditions engagesthe arm 48 of the toggle crank.

Having described the details of construction of my -improved weft detecting mechanism, I will now describe the operation and advantages thereof. The normal running position of the parts is shown in Fig. 5, in which the broad smooth outer end of 'the Contact member 40 engages the weft on the weft carrier and receives the thrust thereof, the member 40 projecting rearwardly slightly beyond the point of the fixed detector 20 and the toothed edgeof the movable detector 22. The toggle link 45 is in portion of a rib 42, as c learlyindicated in Fig. 3, thus locking the toggle from further movement and holding the contact member substantially fixed with relation to the slide 10.

The slide 10, being moved forward by the member 40 acts through the link 25 and the arms 28 and 32 to withdraw the plunger 33, permitting the floating lever 36 to reciprocate freely in the slot 35. Whenthowever, the weft on the weft carrier is depleted to a redetermned extent, the. stud 52 engages t e arm 48, breaking the toggle and moving the parts to the position shown in Fi 6 in which the contact member 40 is wit drawn beyond the end of the regular detectors 2O and 22.

If suflicient weft then remains on the weit carrier, the :movable detector 22 is held thereby from angular movement and the plunger 33 is withdrawn'as before described. lVhen, however, the weft is-subst-antially ex haus'ted, the detector 22 swings frcelvupon its pivot 23, is shown in Fig. 7, and the f un er'33 remains in the path of the floating ever 36, as indicated in Fig. l.. The lever 36- thereupon engages the plunger 33 and moves about the point of engagement as a pivot raising the rod 39 and indicating substantial weft exhaustion as fully ex'- plained `ln my prior Patent No. 972,772.

Attention 1s called to the fact that the parts are alwa 's restored to the normal position shown in igs. 3 and 5 upon every reen ward movement. of the lay and subsequently no rc-setting or other attention is necessary after a transfer has been eil'eeted. All parts are exceedingly simple both in construction and operation and there is nothing about the device which can reasonably be expected to cause any difiiculty in the operation ot the 'f loom.

Having thus described my invention and the advantages thereof, do not wish to be limited to the details herein disclosed othervris'e -than as set forth in the claims, but' what l claim l. ln a loom, a weft detecting mechanism comprising a movable support, fixed and movable detectors mounted thereon, a su plementary weft contactmember movabl;

mounted on said support.. means to hold said contact member from relative forward move-4 ment on said support when enga-ed by awet carrier having a predetermine weft thereon, thereby rendering said fixed 'and movable detectors inoperative, and means to disable said third member and to thereby render said fixed and movable detectors operative upon a predetermined weft de pletion.

2. In a loom, a weft detecting mechanism comprising a movable support, fixed and movable detectors mounted thereon, a supplementary contact member movably mounted on said support, means to hold said Contact member from relative forward movement 'on said support during normal runnin conditions, thereby rendering said fixedan movable detectors inoperative, and means to rrelease said contact member for forward amount of movement on said support upon predeter- .mined weft depletion, thereby rendering said comprising a movable support, fixed and meneer r -ntect member mommy ld en so d seppe-rt, ineens to l ein seid member from relative orwnr" nove-y support dori-ng normel running or z, 'thereby rendering seid and 2 detectors inoperntive, menne to Je seid member rorn operntive position .ipport when the Weit on the ruin f carrier reeebee e predetermined donder-ion, thereby rendering seid d movable detectors operative.

n loom, e weft detecting mechanism eine] e elide, fixed end .movable detecloro monnted thereon, e Snpplementery conteer. member movebly mounted on seid' slide, c. toggle lock effective to bold seid contact member from relative :forward movement on d slide during normal running conditionsI5 d to breek seid toggle upon prede weft depletion.

in e loom., e weft detecting mechanism oemig lQing e eiirle, lined and moveble detecfiore mounted thereon, e, supplementary con member inovebly mounted on seid slide, n toggle lool; effective to bold Said Contact member from relative forward movement on f seid slide during normal running conditions,

and menne to breek said toggle upon predelerniined weft deplerion, one or.' seid toggle niemeer; While in holding position also .bold sind nioveble. etecor from engulnr a. loom, wel't detecting mechanism filiale, ,xed and nieve-ble detecfiiereon, o, supplementary een rneeber inoveoly mounted on said slide7 l effective to bold seid contact rein relative forward moven'ient on norinel running' conditions,

seid lool: including a member having e ,later-v elly projecting erin, end en engaging deviee moveble with the ley end eeetive to swing seid erm end breek seid toggle on predetermined weft depletion.

.n e. loom, e weft detecting mechanism comprising e slide, lined and movable detectore mounted thereon, a supplementary contact member movebly mounted on said slide, means to hold said contact member normally ege-inst movement relative to the slide end in position to engage the weft before the detectors engage the weft, so long as e predetermined amount of weft is present, and means carried by the lay and additional to the Weit carrier., effective to unlock the supplementary Contact member when less than e predetermined, amount of weft is present and to move seid contact member out of its rearward contacting position, thereby pern mitting the lined and movable detectors to become operative'.

8.l ln e loom, e weft detecting mechanism comprising a slide, fixed and movable detectors on said slide, a Supplementary Contact member movably mounted on seid slide, means to bold Seid Contact member normally rearward of the fixed and movable detectors to render the latter inoperative, and means carried by the lay and projecting in advance of the surface to be detected, eil'ective to move seid contact member to e relative forward position, thereby permitting the movable detector to have e detecting Inovenient when less then n predetermined amount of weft is present.

ln testimony whereof I have hereunto :xflixed my signature.

nere. n. nYoN. 

